Free-standing stove



FIG. 1 is a front isometric view of a free-standing stove showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof, the right side being substantially a mirror image thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a free-standing stove, as shown and described. 